Improvement in looms



'LEVI SCOFIELD, oF FARMiNG'roN, WISCONSIN,` AssiGNoR. To HIMSELF i Y ANDJUSTINB. WAIT, OF THE SAM-E PLACE.

vLaien Pittem No'. 69,711, dates october s, 1867.

IMPROVEMENT IN LOOMS.

TO ALL WHOM IT MAY CGNCERN:

Be it knoyvn that I, LEVI SCOFIELD, oflFarmington, Jeffersoncounty, inthe State of Wisconsin, have invented a new and useful Improvement inLooms; and I do' hereby declare that the following is afull andexactdescription thereof, reference being had to the accompanyingdrawings, making a part of this specification, in which-.- l Figure 1 isa top'vietv. i l s Figure 2 is a back vview or elevation.

Figure 3 is an end view or elevation.

Figure 4 is a view from the front of some' of the inner: parts of myloom.

Figure 5A is similar to iig. 2, but showing the treadle and operatingmechanism in a different position; and

Figures 6`and 7 are detail drawings, showing the operation of .thecam-shaft;

The nature of my invention consists in the speciiic constructionandarrangement of the operating mechanism of harnesses and trendles oflooms, whereby the same are uniformly and eiiiciently operated,substantially as hereinafter described. i I

To'enable others skilled in the art'to make and use my invention, I willproceed to-describe its construction and operation.

i I provide my loom with a suitable support or framework, D D E I, andtheV ordinary appendages, as the hand-rail A, shuttle-box B, lay orhatten B, hatten-arms B3, girt--connecting ,hatten-arms' B2,picker-stati' C, picker-swivels F, picker-levers K and K', treadles L,stepping-bar H, guides P P for stepping-bar, arms T attached tobatten-arms,and connecting-links U,rfor operating stepping-bar; rack m,cam-shaft R, cams a a a2 as,

harness J J', and shuttles, beams, and other parts not` shown. Thesliding bar S vWorks on the outer face of the back girt G, and isretained in position by the clasps g. The double cams t n, on thecam-shaft R work against the arms b b of the sliding bar S, While` the.legs d of the bar' S strike the treadle L. The arm b isset out from thebar so as to cause the cam t to 'Work against it, and the cam n againstthe arm b, as shown.' The rack m, secured to the stepping-bar, is keptin position by the guide 1o, figs. 1 and 2, and works in the pinion ethat plays loosely upon the cam-shaft R. 0n the cam-shaft, immediatelyin front of the pinion e, is keyed a c ratchet pinion, or the shaftitself may be made ratchet-faced, .as shown at e. Upon this ratchet-faceworks the gravitating dog or pawl d, figs. 1, 6, and?, that is pivotedon a spur ofthe pinion e, as shovjvn. To prevent themomentum of thecam-shaft R from carrying the cams a al a2 ar beyond the properystopping point, and so, by carrying up one of the cams to meet thedescending harness,V preventing the full downward movement of thelatter, and. a full shed of the warp, (a difficulty hitherto frequentlymet,) I attach to the forward face of the ltepping-'bar H a hunting orstop-lever, f, figs. 1 and 4, that at the proper time, owing to themovement of the stepping-bar, is interposed to stop'the cams in thedesired position, and then is again withdrawn when it is desirable thecam-shaft should revolve. By driving the hatten, hatten-arms,&c.,backward to the position shown by dotted lines in figr the'forwardends of the levers T are driven down, as shown by dotted lines in thesame igure,.carrying with them (by means of the connecting-links U) thestepping-har H that in turn drives down both the treadle L and the rackm. This downward movement of the rack revolves the pinion e and carriesup the gravitating dogd to the position shown in iig. 7, the lattersliding over the ratchet c. The end of the treadle moving down strikesor carries down the horizontal endofwhe picker lever K', (as shown inligt 2,) and so, by means of the strap O and the picker-stati' C,operating the shuttle in one direction. By returning the hatten,batten-arms, &c., to the first position the stepping-bar is raised,carrying up with it the rack m and the, treadle L. The rack moving upcauses (by means of the pawl'd and ratchet e) the shaft .R to makeone-fourth of a revolution, thereby, by means of the cams a a1 a? a3,operating the harnesses J andJ, and by means ,of the cam h. and slidingbar S swinging the treadle L (pivoted tothe treadleswivel M) to theright or opposite `side eE-the loom, as shown in iig. 5. Driving thehatten, hatten-arms, lite., again backward, the rack and treadle areagain driven down, theraok revolving the pinion aand carrying up thepawl d, as before, while the treadle this time strikes andjcarries downthe horizontal -end of the picker-lever K and operates the otherpicker-staff` C, so driving the shuttle in the opposite direction orreturning it to itaiirst position. Again returning the hatten, hatten`arms, c., to their rst position, the rack m is again driven up and thecamfsha'ft revolved, operating again the for the purpose set forth.

nam Q harnesses, and, by means of the cam n and sliding-bar, swingingthe treadle again to the left, as shown in fig. 2. The downward movementof the stepping-bar H not only operates the treadle and shuttle butremoves the stopbarf from its position in front of the cams a al a2 anda3, as shown by dotted lines in iig. 4, while the return upward movementof the stepping-bar not only revolves the shaft R so as to bring downanother of the cams a al aL and a3, but interposes in front of' it atthe end of its desired movement the stop-barf, thereby preventing thecam from passing farther, and closing the shed of the warp. It will beseen that after the sliding bar has been operated to the right by thecam h working against the arm b the sliding-bar is prevented frompassing farther in that direction than it is driven by the cam by thearm b striking the side of the cam n, and that, after the sliding barhas been operated tothe left by the cam n working against the arm b, thesliding-bar is prevented from passing farther in that direction, also bythe arm b striking against the side of the cam h, thereby holding it(the sliding bar) securely during the pauses in its necessary movements,or while the shuttle is being thrown.

What I claim, and for which I desire Letters Patent, ism

l. The stop-bar f, when attached to the stepping-bar H, and used to stopthe cams a al a2 and a3 alternately, thereby preventing the momentumofthe eem-shaft from carrying up too far one ofthe cams that in turnwould prevent the descent of the harness and a full shed of the warp,substantially as described.

2. The sliding bar S, when constructed with the arms b and b', the arm bset out from the face of the bar so as to allow the cam n to workagainst the arm and the cam h against the arm b, and used to operate thetreadle L, substantially as end for the purpose set forth.

3. The double cams h and n, when attached to the cam-shaft R, and usedto operate the sliding bar S, and at the same time holding the latterand the treadle in position while the shuttle is thrown, substantiallyas and LEYI sooFIELD.

Witnesses:

S. D. Locus, G. H. WILLrsroN.

